Simon Willison’s Weblog

ptth (Reverse HTTP) implementation in a browser using Long Poll COMET. Donovan Preston experiments with the cleverly named idea of ptth, where servers send HTTP requests to clients.

Posted 8th December 2008 at 5:22 pm

Recent articles

Introducing gisthost.github.io - 1st January 2026
2025: The year in LLMs - 31st December 2025
How Rob Pike got spammed with an AI slop "act of kindness" - 26th December 2025

comet 57 donovanpreston 1 http 100 ptth 1

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe